Auxiliary jig for gear installation

Abstract

The utility model discloses a gear installation auxiliary jig, which is used for auxiliary installation of a gear of a roots pump, and comprises a first positioning mechanism and a second positioning mechanism, the first positioning mechanism is arranged on one side of the roots pump and used for clamping and positioning a rotating shaft of the roots pump, and the second positioning mechanism is arranged on the other side of the roots pump and used for clamping and positioning the rotating shaft of the roots pump. And the second positioning mechanism is arranged on the other side of the roots pump and is used for adsorbing and fixing the heated gear and assembling the gear and the rotating shaft in a sliding manner. According to the gear heating device, the gear can be installed in a short time after being heated, so that the accuracy of the installation position is guaranteed, the installation stability is better, and the installation difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of jig technology, specifically to a gear mounting auxiliary jig. Background Technology

[0002] Roots pumps are pumps containing two lobe-shaped rotors that rotate synchronously in opposite directions. They are used to obtain a dry, low-pollution high vacuum environment and to compress clean gases, and have a wide range of applications in modern industry. In order to improve the adaptability of the transmission system, and after taking into account the assembly conditions of the shaft and the cavity, the gears used in current Roots pumps need to be heated to 300°C during installation and installed in a short time. However, existing installation fixtures cannot guarantee the accuracy of the installation position and have insufficient installation stability. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this utility model is to provide a gear mounting auxiliary fixture for assisting in the mounting of gears in a Roots pump, comprising:

[0004] A first positioning mechanism is located on one side of the Roots pump and is used to engage and position the shaft of the Roots pump.

[0005] The second positioning mechanism is located on the other side of the Roots pump and is used to adsorb and fix the heated gear and slide the gear between the gear and the rotating shaft.

[0006] Preferably, the first positioning mechanism includes:

[0007] A first positioning plate, which engages with the rotating shaft;

[0008] Multiple first fixing members are disposed on the first fixing plate and fixed to the Roots pump to limit and fix the first positioning plate and the Roots pump.

[0009] Preferably, the first positioning plate is provided with a locking part, and the rotating shaft is inserted into the locking part so that the locking part restricts the rotation of the rotating shaft.

[0010] Preferably, the engaging portion is formed as an annular shape and protrudes in a direction away from the Roots pump.

[0011] Preferably, the engaging portion is provided with a plurality of second fixing members, which pass through the engaging portion and abut against the circumferential surface of the rotating shaft.

[0012] Preferably, the second positioning mechanism includes:

[0013] Multiple third fixing members, one end of which is jointly fixed to the Roots pump;

[0014] The second positioning plate is slidably mounted on the third fixing member, and the gear is attracted and fixed on the second positioning plate and corresponds axially to the rotating shaft.

[0015] Preferably, the second positioning plate has a fitting portion that protrudes toward the Roots pump, and the gear is fitted into the fitting portion.

[0016] Preferably, the axes of the fitting portion and the engaging portion are on the same axis.

[0017] Preferably, the second positioning mechanism further includes a magnetic suction element, which is disposed on the second positioning plate and faces away from the fitting portion, for attracting and fixing the gear.

[0018] The above-described solution of this utility model has at least the following beneficial effects:

[0019] The gear installation auxiliary fixture provided by this utility model can first fix the first positioning mechanism on one side of the Roots pump, so that the first fixing mechanism can position and stabilize the rotating shaft of the Roots pump. At the same time, the second positioning mechanism is fixed on the other side of the Roots pump. After the gear is slid to form a certain distance between itself and the Roots pump, the gear is heated and then attracted and fixed after heating. Finally, the heated gear is slid to be assembled with the rotating shaft. This allows the gear to be installed in a short time after heating, thereby ensuring the accuracy of the installation position, better installation stability, and reducing the installation difficulty.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the gear mounting auxiliary fixture provided in the embodiments of this utility model;

[0023] Figure 2 This is an exploded view of the gear mounting auxiliary fixture provided in this embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the first positioning mechanism provided in this embodiment of the utility model;

[0025] Figure 4 This is an exploded view of the structure of the second positioning mechanism provided in this embodiment of the present invention;

[0026] Explanation of icon numbers:

[0027] 10. Roots pump; 20. Gear; 30. First positioning mechanism; 31. First positioning plate; 311. Engaging part; 32. First fixing part; 33. Second fixing part; 40. Second positioning mechanism; 41. Third fixing part; 42. Second positioning plate; 421. Fitting part; 43. Magnetic suction part; 50. Rotating shaft.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The gear mounting auxiliary fixture of this utility model embodiment is described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1 and Figure 2 As shown, the gear 20 installation auxiliary fixture provided by this utility model is used to assist in the installation of the gear 20 of the Roots pump 10. It includes: a first positioning mechanism 30 and a second positioning mechanism 40. The first positioning mechanism 30 is located on one side of the Roots pump 10 and is used to engage and position the rotating shaft 50 of the Roots pump 10. The second positioning mechanism 40 is located on the other side of the Roots pump 10 and is used to adsorb and fix the heated gear 20 and slide the gear 20 and the rotating shaft 50 together.

[0036] The rotating shaft 50 is assembled in the cavity of the Roots pump 10, which can adjust the gap between the rotors. Then, the rotating shaft 50 is positioned by the first positioning mechanism 30 to prevent the rotating shaft 50 from shifting or moving, thus improving stability during assembly.

[0037] The gear 20 installation auxiliary fixture provided by this utility model can first fix the first positioning mechanism 30 on one side of the Roots pump 10, so that the first fixing mechanism can position and stabilize the rotating shaft 50 of the Roots pump 10. At the same time, the second positioning mechanism 40 is fixed on the other side of the Roots pump 10. After the gear 20 is slid to form a certain distance with the Roots pump 10, the gear 20 is heated and then attracted and fixed after heating. Finally, the heated gear 20 is slid to assemble with the rotating shaft 50. In this way, the gear 20 can be installed in a short time after heating, thereby ensuring the accuracy of the installation position, better installation stability, and reducing the installation difficulty.

[0038] Reference Figure 3 As shown, the first positioning mechanism 30 includes: a first positioning plate 31 and a plurality of first fixing members 32. The first positioning plate 31 is engaged with the rotating shaft 50. The plurality of first fixing members 32 are disposed on the first fixing plate and fixed to the Roots pump 10 to limit and fix the first positioning plate 31 and the Roots pump 10.

[0039] In this embodiment, the first fixing member 32 can be a bolt or the like. Multiple first fixing members 32 can be installed at the edge or diagonal position of the first positioning plate 31, so that after the first positioning plate 31 and the Roots pump 10 are fixed to each other, the first positioning plate 31 can be restricted by the first fixing member 32, and the rotating shaft 50 can be restricted by the first positioning plate 31 to avoid the rotating shaft 50 from deflection, thus ensuring better stability during assembly.

[0040] In one specific embodiment, the first positioning plate 31 is provided with a locking part 311, and the rotating shaft 50 is inserted into the locking part 311 so that the locking part 311 restricts the offset of the rotating shaft 50; further, the locking part 311 is formed as an annular shape and protrudes in the direction away from the Roots pump 10.

[0041] In this embodiment, the engaging part 311 can be sleeved on the surface of the rotating shaft 50, so that the engaging part 311 can position and restrict the rotating shaft 50. The engaging part 311 can lock the rotating shaft 50 in the axial direction or in the radial direction to ensure that the rotating shaft 50 is restricted by the first positioning plate 31 and avoids displacement.

[0042] In a preferred embodiment, the engaging portion 311 is provided with a plurality of second fasteners 33, which penetrate the engaging portion 311 and abut against the circumferential surface of the rotating shaft 50. The second fasteners 33 can be bolts, and can be locked in the radial direction or in the axial direction of the engaging portion 311. The second fasteners 33, pressed tightly against the circumferential surface of the rotating shaft 50, prevent the rotating shaft 50 from shifting in any direction, thus improving stability.

[0043] Reference Figure 4 As shown, the second positioning mechanism 40 includes: a plurality of third fixing members 41 and a second positioning plate 42. One end of the plurality of third fixing members 41 is fixed together with the Roots pump 10. The second positioning plate 42 is slidably disposed on the third fixing members 41, and the gear 20 is adsorbed and fixed on the second positioning plate 42 and corresponds axially with the rotating shaft 50.

[0044] In this embodiment, the third fixing member 41 can extend along the axial direction of the Roots pump 10, so that the second positioning plate 42 can slide on the third fixing member 41. By fixing the third fixing member 41 to the Roots pump 10, and then moving the second positioning plate 42 and the gear 20 to a position away from the Roots pump 10, the gear 20 can be attracted and fixed after heating, and the second positioning plate 42 can slide towards the Roots pump 10 to assemble and fix the gear 20 and the rotating shaft 50, thus improving the installation efficiency.

[0045] In one specific embodiment, the second positioning plate 42 has a fitting portion 421, which protrudes toward the Roots pump 10, and the gear 20 is fitted in the fitting portion 421; furthermore, the axes of the fitting portion 421 and the engaging portion 311 are on the same axis.

[0046] In this embodiment, the gear 20 can be partially embedded in the fitting part 421, thereby ensuring a higher degree of fitting between the gear 20 and the second positioning plate 42, better stability of the gear 20 on the second positioning plate 42, and ensuring the accuracy of the installation position during assembly.

[0047] In a preferred embodiment, the second positioning mechanism 40 further includes a magnetic suction member 43, which is disposed on the second positioning plate 42 and faces away from the fitting portion 421, for adsorbing and fixing the gear 20. The heated gear 20 can be fixed to the second positioning plate 42 by vacuum adsorption or magnetic attraction, so that when the second positioning plate 42 moves on the third fixing member 41, it can move the gear 20 away from or closer to the rotating shaft 50, thereby completing the heating and assembly actions and improving assembly efficiency.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A gear mounting auxiliary jig for assisting in mounting a gear of a Roots pump, characterized by, include: A first positioning mechanism is located on one side of the Roots pump and is used to engage and position the shaft of the Roots pump. The second positioning mechanism is located on the other side of the Roots pump and is used to adsorb and fix the heated gear and slide the gear between the gear and the rotating shaft.

2. The gear mounting aid jig of claim 1, wherein The first positioning mechanism includes: A first positioning plate, which engages with the rotating shaft; Multiple first fixing members are disposed on the first positioning plate and fixed to the Roots pump to limit and fix the first positioning plate and the Roots pump.

3. The gear mounting aid jig of claim 2, wherein The first positioning plate is provided with a locking part, and the rotating shaft is used to be inserted into the locking part so that the locking part restricts the rotation of the rotating shaft.

4. The gear mounting aid jig of claim 3, wherein The engaging portion is formed in a ring shape and protrudes in a direction away from the Roots pump.

5. The gear mounting aid jig of claim 3, wherein The engaging part is provided with a plurality of second fixing members, which pass through the engaging part and abut against the circumferential surface of the rotating shaft.

6. The gear mounting aid jig of claim 3, wherein The second positioning mechanism includes: Multiple third fixing members, one end of which is jointly fixed to the Roots pump; The second positioning plate is slidably mounted on the third fixing member, and the gear is attracted and fixed on the second positioning plate and corresponds axially to the rotating shaft.

7. The gear mounting aid jig of claim 6, wherein The second positioning plate has a fitting portion that protrudes toward the Roots pump, and the gear is fitted into the fitting portion.

8. The gear mounting aid jig of claim 7, wherein, The axes of the fitting part and the engaging part are on the same axis.

9. The gear mounting aid of claim 7, wherein The second positioning mechanism further includes a magnetic suction element, which is disposed on the second positioning plate and faces away from the fitting portion, for attracting and fixing the gear.

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